Machine for gluing book backs



Dec. 2l, 1954 Filed Jan. 3l, 1950 W. W. MCCAIN ETAL MACHINE FOR GLUING BOOK BACKS 1l Sheets-Sheet l Dec. 2l, 1954 w. w. MccAlN ET AL 2,697,236

MACHINE FOR GLUING BOOK BCKS Filed Jan, 31, 1950 11 Sheets-Sheet 2 ND# u, ZUM MC2/MU yfor/zey" Dec. 21, 1954 w. w. MocAxN ETAL 2,697,236

MACHINE FOR GLUING BOOK BACKS Filed Jan. 3l, 1950 11 sheets-sheet 5 Dec. 21, 1954 w. w. MccAlN ET AL 2,697,236

MACHINE FOR GLUING BooK BAcxs Filed Jan. 3l, 1950 11 Sheets-Sheet 4 Dec. 2l, 1954 w. w. MccAlN ETAL 2,697,236

MACHINE FOR GLUING BOOK BACKS Filed Jan. 3l. 1950 11 Sheets-Sheet 5 cor/eey;

Dec. 21, 1954 W. w. MccAlN ET AL 2,697,236 MACHINE FOR GLUING BooK BAcKs Filed Jan. 5l, 1950 11 Sheets-Sheet 6 '46 ffm/enfans' Dec. 21, 1954 w. w. MccAlN ETAL 2,697,235

MACHINE FOR GLUING BooK BAcKs Filed Jan. 51,` 195o 11 sheets-sheet 'r Dec. 2l, 1954 w. w. MccAlN ET AL 2,697,236

MACHINE FOR GLUING BooK BAcKs Filed Jan. 31, 11.950 1l Sheets-Sheet 8 Dec. 2l, 1954 w. w. MacAlN ETAL 2,597,236

MACHINE FOR GLUING BOOK BACKS Filed Jan. 3l, 1950 11 Sheets-Sheet 9 Dec. 2l, 1954 w. w. MocAlN ET AL 2,697,236

MACHINE FOR GLUING BooK BAcxs Filed Jan. 3l, 1950 11 Sheets-Sheet l0 Dec. 2l, 1954 W. w. MccAlN ETAL 2,697,236 MACHINE FOR GLUING BooK BAcxs Filed Jan. 3l. 1950. 11 Sheets-Sheet 1l Ill d.. 2975 ."Illlllllllllllllllllllllllll. Il

United States Patent ffice 2,697,236 Patented Dec. 21, 1954 2,697,236 MACHINE FOR GLUING BOOK BACKS William W. McCain, Oak Park, and Chester E. Hillman, Park Ridge, lll.; said Hillman assignor to said McCain Application January 31, 1950, Serial No. 141,484 7 Claims. (Cl. 11-1) This invention relates to the production of case bound books and particularly to machines for gluing the book backs, as such backs are defined by the folded edges f the several signatures that make up the book.

In the production of case bound books, the printed sheets are folded together and sewed to afford a plurality of sections, or signatures, and these signatures are then placed together in the proper order and the folded and sewed back edges of the signatures are glued together. ln the event that the signatures are to be trimmed, this may be done either before or after the gluing operation is performed.

The glue that is applied to the book back is brushed after it has been applied to the back, thus forming grooves along the back in the space between the adjacent signatures, and after the gluing operation has been performed, the back is usually rounded in accordance with common practice prior to the application of the backing. ln some instances, of course, the signatures may be sewed together by what is termed side sewing, and this may be performed prior to the gluing operation, or may be performed after the gluing operation but before the rounding and backing.

The operation of gluing the book backs has heretofore been quite a tedious and a relatively slow operation, and it is an important object of the present invention to simplify the gluing of book backs, and to enable such gluing to be performed at a relatively high rate of speed while at the same time insuring uniformity and accuracy in the finished product.

The gluing of book backs has been accomplished 'through the use of different types of adhesives, and one `such adhesive is an animal glue that has a plasticizer added thereto. There has also been considerable experimentation and some actual gluing accomplished with synthetic adhesives such as resins, and these synthetic adhesives have, in the trade, been termed hot melts. Another object of the present invention is to enable such gluing operations to be performed with either type of adhesive and to enable this to be accomplished in a single machine without any material alterations in the machine. Related objects are to afford means in such a book back gluing machine which is effective where hot melts are used to quickly set such adhesive and dissipate the heat so thatthe book back gluing operation may be performed at a relatively high speed, and to afford this means in a form such that undesired adhesion is avoided Where the relatively slow setting animal glues are employed.

ln the operations involved in gluing book backs, it has been quite troublesome to attain proper positioning of the several signatures that are to be glued together to form each book, and another important object is to enable the signatures to be fed automatically into the gluing machine in groups and to enable the signatures included in each such group to be readily shifted and positioned one with respect to the other so as to insure accuracy and uniformity in the finished product. A related object is to enable such automatic feeding of the groups of signatures and such positioning or aligning of the signatures of such group with respect to each other to be readily and easily attained, and to accomplish this at a relatively high rate of speed in such a Way that the operations may be performed by mechanism of a character that may be simply and easily maintained.

Where a high speed book back gluing machine is to be utilized, it is important that the machine be capable of handling books of different thicknesses and that the machine be so arranged to enable the machine to be set quickly and easily for any different thickness of book, and to enable this to be accomplished is another important object of the present invention.

When glue has been applied to the back of the book, the brushing operation which removes the excess glue is quite important, and another object is to enable this brushing operation to be performed accurately and Without transferring glue to the end edges of the books. More specifically, it is an object of this invention to enable the brushing operation of the aforesaid character to be performed on the books that are moving rapidly through a machine and to enable this brushing operation to be performed and controlled in such a way that proper operation of the machine on books of different sizes is assured.

ln the application of glue to a book back, itis, of course, important to apply the glue in a proper amount, and to enable the amount of glue applied to each book to be rapidly and easily adjusted and controlled is still another object of the present invention.

Other and further objects of the present invention will be apparent from the following description and claims and are illustrated in the accompanying drawings which, by way of illustration, show preferred embodiments of the present invention andthe principle thereof and what we now consider to be the best mode in which we have contemplated applying that principle. Other embodiments of the invention embodying the same or equivalent principie may be used and structural changes may be made as desired by those skilled in the art Without departing from the present invention and the purview of the appended claims.

Tn the drawings:

Fig. 1 is a perspective View of a book back gluing machine embodying the features of the present invention, a series of books being illustrated in position in the machine and in different steps of completion;

Fig. 2 is a plan view of the machine;

Fig. 3 is an end view of the input end of the machine, the View being taken substantially along line 3 3 of Fig. 2 and being at an enlarged scale;

Fig. 4 is a fragmentary plan View of the input end of the machine, the view being taken at a larger scale;

Fig. 4-A is a schematic perspective view illustrating an intermittent clutch utilized in the operation of the supply magazine;

Fig. 5 is a side elevational View of the part of the machine shown in Fig. 4, the view being taken substantiallv along the line 5-5 of Fig. 4;

Fig. 6 is a fragmentary plan View of the rear edge jogeer mechanism;

Fig. 7 is a vertical sectional view taken substantially along line 7-7 of Fig. 6;

Fig. 8 is a fragmentary side elevational view taken from the left in Figs. 6 and 7 and illustrating details of the rear edge iogger;

Fig. 9 is an end elevational view somewhat similar to Fig. 3 and taken partially in section along the line 9 9 in Figs. 4 and 5, but showing the books in their operative relationship with respect to the book feeding mechanism;

Fig. 10 is an enlarged fragmentary side elevational view illustrating the way in which the books are advanced from the book feeding mechanism toward the gluing mechanism;

Fig. l0-A is a vertical view showing a portion of the mechanism in Fig. 9 at an enlarged scale;

Fig. l1 is a side elevational view of a portion of the chain shown in Fig. l0;

Fig. ll-A is a sectional view taken along a line parallel to the plane of Fig. 11, but spaced between the side edges of the chain;

Fig. l2 is a plan view of one end clamping conveyor which receives feed chain and moves such books and brushing mechanism;

Fig. 13 is a side elevational view of the mechanism shown in Fig. 12;

Fig. 13-A is a plan View showing an alternative backup means for the clamping conveyor;

of the supporting and the books from the past the glue applying advancing means serve to discharge clamping conveyors .incase a synthetic glue hasfbeen used.

Fig. 13-13 is a sectional view taken along the line 'IS-B-lB-B of Fig. l3-A;

Fig. 14 is a plan view of the delivery end of the clamping conveyor;

Fig. 15 is a Vside elevational view Iof the 'mechanism shown in Fig. 14;

Fig. 16 is a fragmentary `plan view Vof 'the adjusting means for the clamping conveyor;

Fig. 17-A is a side elevational line l-A-l-A of Fig. I16;

Fig. 17 is a sectional view taken'along the line 17-17 -ofFig l7-A;

Fig. 18 is a plan view of the final delivery mechanism which received theglued books from the clamping conveyor; j

Fig. 19 is a side elevational view ofthe mechanism lshown in Fig. 18;

Fig. 20 is a vertical pot mechanism and illustrating the relationship of the glue applying means, clamping conveyor;

Fig. 2l is an enlarged fragmentary view illustrating the way in which the glue `is appliedto the backs of the signatures that make up a book',

Fig. 22 is a view showing a plurality of signatures in the relationship in which they are delivered by lthe feed belt to the clamping conveyor; and

Fig. 23 is a diagrammatic view showing the way in which glued books may be stagger-piled when animal glues are being used.

For purposes of disclosure, the invention is herein illustrated as embodied'in'bookback gluing machine 30 into which assembled groups of signatures'S, Figs. 2l and 22, may be fed in groups Vthatareto constitute books B, Figs. l, 9, l() and 22, so that'as the' groups of signatures are advanced throughlthe machine, they may'have glue 31 applied thereto and properly brushed Vso as to take the form shown in Fig. 21, thereby to glue the signatures together to form the'b'ooks B.

view taken along the sectional lview lthrough the glue The machine comprises an elongated table-like frame F at one end of which asupply magazine M is provided into which groups of signatures and in the course of operation of the machine, as will `hereinafter be described, each group of signatures S that is to constitute a book B is withdrawn from the rear end of the magazine and is forced downwardly into position upon advancing or feedingmeans which,as will hereinafter be described, are effectiveto impartfa jogging action to the .several signatures S'so as to thereby place the folded lower edges'thereof in acornmon'plane. vWhile such vertical jogging forces are being applied'to the books, additional means are eifective to apply horizontal jogging forces that are applied tothe rear'edges'of'thebooks to align the signatures in this direction. ySuch feeding or the books in succession into position between a pair of opposed clampinglconveyors 35 which erigage'ouposite 'sides of thebook to maintain several signatures S in'theproper'relationship to each other after the book has`been'movedoif `of the end of the ir-iial feeding means. The clamping conveyors 35 thus hold the book in assemblv relation whileexposintr the lower or folded edvesof the signatures `Stand as advancingr 'movement o'f the books B is continued, these books B vmove successively into position over "a glue 'applvinq and brushinq'unit that is illustrated infdetail inFig. 20 of the drawings. The'arrangemerit is'suchthat glue is applied to the flded'lower edges'f thesignatures S, 'and the book then'movesfintofpositionoverthe brushing mechanism of the unit 38, and wheny this "has ltaken "place, the brushing'means are automatically'moved upwardly and into contact with the'glued lower edge'ofthe book so that the glue is properlybrus'hedas the advancing movement of the book takes place.

After passing the kgluing and 'brushing `unit 38, the

y nbooks E continue theiradva'ncing movementzbetween the clamping conveyors 35, and at the-oppositeV ends of-such the books are discharged onto'a delivery conveyoi' unit 40 which .is effective to apply water to the glued edge of theibook, .therebyto prevent-stick ing of the book to the .conveyor-in the nevent that 4animal glue has been used, or to cause rapid -cooling of the rglue IFrom the delivery conveyor unit 40, vthe books are Adischarged yonto or toward a final stacking table 41 where an operator the brushing mechanism and the S may be introduced,y

iii)

8 ranged tobe operated in unison f in any desired position by 4 removes the books and places them in stacks or the like 'in preparation lfor the next operation.

Because ofthe nature of the various driving connections in the present machine, the construction and operation of the clamping conveyors 35F and SSR will first be described. Thus, the details of the clamping conveyors are illustrated in Figs. l2 to '15, and in these figures it will be evident that the frame F comprises three main upriglits 44, 45 land 46. The upright elements 44 and 45 are spaced .longitudinally of themachine and serve as supports for yhorizontally extending mounting vframes 47F and 47R that support the clamping conveyors 35K and 3512. Thus, the .upper faces of the uprights 44 and 45 are -formed as flat mounting surfaces 48, and the mounting frames 47K and "47F Arest -upon and are secured to these two mounting surfaces 48. Each of the frames 47R and 47F is relatively long and rigid in character, and the mounting frame 47K carries a driving .pulley StlR vadjacent to its right-hand end as shown in Fig. l4. Adjacent to the left-hand end of the mounting frame 47K, an yidler pulley 51B. -is mounted, and the pulleys 56K and SLR have a relatively wide, end-less steel belt 52K extended thereabout. The idler pulley 51K is mount- .ed on a'yoke 53B. that is mounted in turn for endwise sliding movement in Va bracket 54K that extends to the left from-the left-handend of the mounting frame 47K, and a spring 'ESSR acts on the yoke 53K to maintain the -belt SER under -tension 'between the two pulleys. The mounting of the ilder pulley 51K is arranged with an adjustment structure SSR at the upper end of the pulley, thereby vto enable the vertical axis of the pulley SER to be adjusted so as fto attain proper tracking of the belt :12R-about the pulleys lSOR-and 51K.

The'forward mounting frame 47F is similarly provided lwith a driving pulley `SWF and an idler pulley SlF about which an Aendless. steel belt SZF 'is extended, and the mounting of the-idler'pulleySlF is in all respects similar vto the mounting on the idler pulley SlR.

The rear `mounting frame 4711 is permanently fixed in a predetermined .relationship on the mounting surfaces 48, and this is accomplished by means of clamping bolts SSR that extend fthrou'ghithe mounting frame 47R and into `the supports 44 Vand 45. y ihe'f'orward'mounting frame'4'7F is, however, arranged t4for adjustment from zfront to rear ofthe machine so that the distance between the -two adjacent runs of the belts 'S2Rand`52F`may rapidly be adjusted, for properly clamping books of different thickness, as will hereinafter be described, and to enable this to "be accomplished, the mounting frame "47F1has releasable clamping bolts SF extended `downwardly therefrom thro-ugh slots 59 that -are formed in the mounting surfaces 4S, and hence when the boltsfSSF'are-released, the'mounti'ig frame 47F may be adjustedfrornfrontto rear and may then be clamped tightening of the clamping bolts SSF.

-ln'the'present instance 'the clamping forces that must be appliedrby the adjacent runs of the belts SZF and 52R to the opposite faces of the books `B are ouite substantial, and'to enable such forces'to be applied without necessitatin'g undue 'tightness or'tension on'tlie belts, the adjacent runs of these belts are arranged to'run against upstaodiog back-iioplates lF and llRthat are formed as upwardly extending llanges -on the frames 47R and 47L. The faces of lthe back-up plates 6M: andrill are covered by strips of molded bearing material 6113 and i', thereby to avoid obiectionnble'heating due to friction caused by the rapidlvmoving belts.

The adjustment of the front frame 47F is in the present instance attained by means including an operating hand Wheel-62that isfixed'on the-forward endof an adjusting 'shaft63- This adjusting shaft is arranged at its rear end in a mounting'bracketll so as to be held against endwise movement, yand `in its forward end portion, adjacent to the hand wheel 62, a 4screw threaded section 6ft-' is formed, this screw threaded section being engaged with a nut 65, Fig. 16, that is afforded `on the f* 47F adjacent to ythe forward edge'of the frame 47E. in this connection it should be noted that the shaft 63 is disposed in position over the supporting frame 45, and a similar adjusting shaft 66 is provided over ythe upright support 44. This shaft 66 has a similar screw threaded portion that engages a nut-67 formed-on the forward mounting frame 47E'. The two adjusting shafts 64 and 66 are arby means including an that are mounted wheel 62 has a central hub 62H that is rotatably supported on the sleeve 73 between an integral outer fiange steel plate 74 that is fixed as a flange rearwardly and into engagement with the plate 74 by springs 77S contained in the pockets 76. The balls 77 are thus engaged with cone-shaped recesses 78 formed in the plate 74 at a spacing which corresponds to the spacing of the pockets 76. Hence, the engagement of the balls 77 with the recesses 78 will normally transmit the rotative movements of the hand wheel 62 to the shaft 63, but the strength of the 80 of the machine just to supported on upper and lower brackets 90 and 91 that are fixed on the respective frames 47R and 47F. At the lower ends of the shafts 89F and 89R, bevel gears 92F and 92R are fixed, and the bevel gear 92R is arranged forwardly of and in a meshed relationship with a bevel gear 93K that is keyed onto the shaft 85. The bevel gear 92F is arranged rearwardly of and in a meshed relationship with respect to the bevel gear 93F that is splined onto the shaft 85, and these bevel gears 93F and 93K are so related to the bearings 87 and 88 that the bevel gears are maintained in a meshed relationship with the bevel gears 92 by such bearings.

The forward pressure conveyor 35 is arranged, as hereinbefore described, for adjustment from front to rear, and

in the course of this adjustment, the bevel gear 93F is held between the gear 92F and the bearing bracket 88 so that the gear 93F moves along the shaft S5 by reason of its splined mounting thereon and the driving connection is thereby maintained for the pulley 50F.

At its rear end, the shaft 85 has a bevel gear 95 fixed thereon, and this bevel gear is in a meshed relationship with the bevel gear 96 that is fixed on a horizontal transmission shaft 97 which is supported in a bearing 98 that extends rearwardly from the upright support 45. The bearing bracket 98 also has a bearing for the rear end of the shaft 85 just rearwardly of the bearing 87. The transmission shaft 97 extends to the left along the rear side of the machine as shown in Figs. l, 2, l2, 13 and 14, and at its left-hand end the shaft 97 is supported in a bearing bracket 99 that is fixed on the upright support 44 so as to extend rearwardly therefrom. A bevel gear 100 fixed on the shaft 97 adjacent to bearing bracket 99 is meshed with a bevel gear 101 that is fixed on a forwardly extending shaft 102, Figs. 12 and 13, that is utilized as a source of power for driving the glue applying mechanism of the unit 38 and also for driving other mechanisms, including the book feeding mechanism associated with the magazine M, and the feed conveyor whereby the jogging action is applied to the books as they are advanced unto the clamping conveyors 35F and 35B. As shown in Fig. l, the bevel gear connections 95 and 96 are enclosed by a protective housing 103, while the bevel gear connection afforded by the gears 101 and 102 is enclosed by a protective housing 103A. Similarly, as shown in Fig. l of the drawings, the chain connection 70 is housed by a removable casing 105.

In respect of many books that are to be glued on the present machine, it will be obvious that the width of the books may be such that only a relatively small lower portion of the book will be clamped between the aforesaid clamping conveyors, and, as will be evident in Fig. l of the drawings, a pair of stationary guide bars 107F and 107K are mounted on the casings 106F and 106R so that they may engage opposite side faces of the books B above the tops of the casings 106F and 106K. These guide bars 107F and 107K are adjustably supported so that they may be set in different vertical locations in accordance with the vertical size of the books B that are being any vertically adjusted position along the rods by means including wing-headed screws 109F. Similarly, the rear frame 47R has a pair of opposing vertical rods 10812., and brackets on the rear guide rod 107K embrace these opposing rods, and are adapted to be clamped in any position by means including wing-headed set screws 107K.

As hereinabove pointed out, the constantly driven shaft 102 is utilized to afford driving power for the feeding mechanism that is associated with the magazine M and with the feeding mechanism that transports the individual books from the feeding mechanism veyors 35F 130, Figs. l2 and 13, fixed thereon that is a somewhat smaller gear 131 that is disposed upwardly and somewhat to the left of the shaft 102 as viewed in Figs. l2 and 13. The gear 131 is mounted on a horizontal shaft 133 that is carried at its rear end in a part of the bracket 99 and at its forward end such shaft is supported in a bracket 134. The shaft 133 serves as a support for a. pair of sprockets 135 that in the present instance are fixed on the shaft so as to be disposed almost directly beneath the adjacent runs of the belts 52R and 52F. These sprockets 135 act as a driving means for a feed so as to extend about other sprockets 137 that are fixed on a transverse shaft 138. The shaft 138 is disposed in an extension frame 139 that extends from the main frame F and is braced by means including upwardly extending arms 144i. As shown in Figs. 7 and 9, the extension frame 139 includes a pair of spaced members 139K and 139F, and these two members form vertical rails along the upper edges of each of the two chains 135R and 1351: are adapted to ride. The arrangement is such, however, that the chains 135R and 135F are given a rapidly reciprocating motion through a relatively short stroke in vertical direction in the course of their movement along the upper portions of the frame members 139B and 1395, and for this purpose each of these two frame members has a corrugated track MSR and 145F, Figs. 7 and l0. fixed thereon so as to engage the rollers of the respective chains. The corrugations of the two tracks are somewhat in the nature of sine wave curves so that in the course of rapid movement of the two chains, the chains will be given a rapid vibration in a vertical direction.

The two chains are connected by transverse carrier rods 146, as will be evident in Figs. 7, l0, 1l and ll-A, so that between the two chains a support may be afforded upon which books may be carried.

as will be evident in Figs. l0 and lO-A,

facs-nase lWhenthey are advancing on fthe feed chain from the \ma ga'zine`M and into thebight of the pressure conveyors.

Thus, as will `be `evident in Figs. 4 and v5, guide members IF and 150K-are afforded above'the feed chain 135 ;an`d between the magazine M and the adjacent yend of the :pressure-conveyors. -As shown in Fig. 4, the rear guide 'members l15ilRare supported in what may be termed a iixedhtransverse position in -that they bear a particular relationship with respect to the rear pressure conveyor 35R,lbut it will be noted that these guide members 1501,

Fig. 5, may be set in different vertical positions along vertical supporting posts 15013. The forward guide member 1501:, however, .is supported in-upstanding brackets 151 by means-including horizontal adjusting screws 152 whereby the front sideplate may be adjusted laterally of the feed conveyor 135 to attain the-desired relationship -with respect to theforward pressure conveyor 35F when this pressure-conveyor has been disposed in the desired adjusted relationship.

The' magazine M-as herein shown is afforded by a horizontal supportingplate 155 which extends forwardly from a `point adjacent to but spaced'from the forward edge of the feed-conveyor 135 and the supporting plate 155 has -apair of -adjustable side guides 156 thereon so that groups of signatures S may be put in position on the supporting of the platform or supporting plate 155 a shaft 159 is mounted by means of brackets 16%, and this shaft has a plurality of pulleys 161 thereon over which the feed belts 155B are extended. At its rear end, and between the end of the platform 155 and the frame 135F, another Shaft 164 is mounted, and this shaft has a plurality of drive pulleys 166 fixed thereon and over which the feed belts 155B extend. Thus, upon actuation or advancing movement of the belts 155B, the groups of signatures in the magazine M may be advanced along the supporting plate 155 and toward a position over the feed conveyor 135. As such forward movement progresses, the leading group of signatures S is moved outwardly onto a plurality of Aprojecting arms 163 that extend in a rearward direction from the supporting plate 155 so as to form an effective extension thereof. These arms 168 are arranged to terminate substantially in the plane-of the forward guide member 15411:, and the rear guide members 1501i serve as an abutmentagainst which the advancing group of signatures may be positioned. The arrangement is such thatwhen the leading side face of the group of signatures engages such stop means, all of the signatures that are to constitute a book B are positioned beyond the ends of the arms 168, thereby to be in position for downward movement-onto the feed conveyor 135. Thus, after the signatures in the magazine M have been advanced into abutment with the guide members 15011, the group of signatures that is to constitute a book B are moved downwardlyinto engagement with the feed conveyor 135.

When a'book B is to be moved downwardly into engagement with the feed conveyor, this is accomplished by means of a feed plate 170 that-is adjustably carried on the forward ends of a pair of rocking arms 171. These rocking arms 171 are supported at their `rear ends by a pivot shaft 172, which is in turn carried in bearings 173 that are fixed on the mounting posts which support the rear guide memberslSfiR. The rocking arms 171 may be actuated through rocking movements so as to move the plate 170 'between the upper position shown in dotted lines in Fig. 9 and the lower or actuated position shown in full'lines in'Figq9. This is accomplished by means including a vertical operating rod 175 that is extended upwardly through a pivot block 176 carried on an arm 177 which, as shown in Fig. 4, is fixed on the pivot shaft 172. The lrod 175 may be fixed in any desired relation with respect to the pivot block 176 by means including 'a wing nut 176N. The rod 175 extends downwardly 'through a guide bracket 179 and a lower guide bearing 180, and at its lower end the rod 175 has a cam roller l181 fixed thereon. A spring 182 surrounds the rod 175 below-the guide bracket 179 and-acts between-this guide 85 bracketand-'afcollar183 'fixed-on the rod i175 to urge -the rod downwardlyiand thus maintain the-roller 175 in-en'- gagement with an adjustable, single lobe-cam 185. This cam 185 is carried at the rear-end of a mounting sleeve liwhich is rotatably supported on a stub shaft 187 that is in turn carried on a bearing bracket 183 fixe'd'to the-rear surface of the frame member 139K. The sleeve 186 carries a sprocket 190 at its rear end whereby the cam 18S-is driven in timed relation to the other parts of the machine, as will'hereinafter be described.

When a book VB khas moved beyond the supporting arms 16S and has been shifted-downwardly onto the supporting rods 146 of the feed chains, the rear or trailing edge of the book is engaged by Vfeedlugs 195,p`shown in Fig. lO of the drawings. Similar feed lugs are afforded at spaced Ipoints aloug'the feed conveyor. These feed lugsare preferably formed as illustrated in Figs 'll and ll-A of the drawings by providingupper and lower blocks 195U and '195L that are arranged'to partially-embrace adjacent cross rods 146, as shown -in Fig. ll-A, and a fastening screw 196-ispassed upwardlythrough the lower one of these'blocks and is threaded into the-upper block so as to clamp'the opposed'blocks intoposition on the chain. As-soon as the trailing edge of the -newly fed book B has been engaged by a feed lug Y195, this bookis advanced to the right in Fig. 4 toward the'adjacent end of the clamping conveyor mechanism. ln the course of this advancing `movemer1t,`the book is not only subjected to the vertically applied jogging forces that result from the action ofthe rails 145,'but this book is also subjected to resiliently applied downward forces, and to jogging forces appliedto'the rear edges of the signatures, so that prior to the time when the bookreaches the clamping conveyor, the several signatures will have been'located in a properly aligned relationship.

The downward forces that are applied `to the upper edges of the signatures are attained through -the use-of spring means, :and to this end, a horizontal mounting plate 200is supportedon adjustable brackets 2111 from the upper guide-member 150K, vas will be evident in Figs. 4 and 5 of theldrawings. The mounting plate 2% is arranged'to overlie the path ofthe advancinglbooks in the space between the feed plate 171i and the adjacent end of the clamping conveyor. On its lower face,'the mounting plate 205 has a plurality of spring arms'ZtlZ thatextend downwardly and irran advancing direction, or, in other words, to the'left as viewed in Fig. 5. These arms are spacedlongitudinally of the mounting plateti, and thus the upper edges of the several signatures of a=book are engaged yieldingly by these spring arms 202 in succession as the book advancesfrom the magazine M to the clampmg conveyors.

The jogging forces lthat are applied to the rear edges of the hook :'B are attained through the use of a rear edge jogger mechanism 210 that is shown in detail in Figs. `6and 7, and that is shown in its association with the other elements of the machine in Figs. 2, 4 and 5 of the-drawings. This rear edgejogger mechanism 210 comprises an elongated jogger arm '211 that is so mounted and actuated that as a. book B is moving forwardly with the feed conveyor '135, the jogger arm 211 is moved transversely of the 'feed conveyor and into position behind such "book B, and then is moved .forwardly or in au advancing direction so as to engage the rear edge of the book and apply vibrating or jogging movements to these rear edges in an advancing direction. After such rear edge jogging movements have been applied to the bookfor a substantial distance of advancing travel, the jogger arm -211 is withdrawn laterallyfrom its position behind the book 'and is returned to its Vinitial position so that it may be'e'ifective in the same manner-upon the succeeding'book B.

Thus, as shown in'detail in Figs. 6 and 7 of the drawn ings, the jogger arm 211 is mounted on and actuated 'by a pair of operating chains 215 and 216, both of which are of endless form, as will be evident in Fig. 6. These chains 215 and 216 are of the roller bearing type, and are mounted ina common horizontal plane .just rearwardly of the feed conveyor 135. The chain 215 is su, ported at its opposite ends'by a driven sprocket 315A and anadjustable idler sprocket 215B that are disposed .vertical axes which are spaced in equal amounts from theline of travel of the feed conveyor.

Thus, the chain '2715 is supported between the -two sprockets 215A and 215B so that two relatively long toth and engaging the stralght runs of the nal surfaces thereof.

The chain 216 is similarly supported on a drive sprocket 216A and an adjustable idler or take-up sprocket 216B that are mounted on vertical axes rearwardly of the chain 215 so that the straight runs of the chain 216 will also be parallel to the path of the feed conveyor. similar intermediate block 216C is disposed between the two runs of the chain 216 to maintain these runs of the chain in straight line paths between the two mounting sprockets. It will be observed that the two sprockets that support the chain 216 are disposed in positions somewhat in an advancing direction with respect. to the sprockets that support the chain 215. In other words, as viewed in Fig. 6, the advancing direction of the feed conveyor is indicated by an arrow, and the offset of the chain 216 with respect to the chain 215 is in the advancing direction that is thus indicated.

The two chains 215 and 216 are driven in unison or, in other words, at the same speed, so that the runs thereof that are adjacent to the feed conveyor move in the advancing direction above described. Thus, the drive sprockets 215A and 216A are xed, respectively, on vertical shafts 2153 and 216s that are rotatably supported in a mounting block 220 so as to extend downwardly beneath this bock. These shafts have drive gears 215G and 2166 fixed thereon near their lower ends, and these gears are interconnected by an idler gear 221 that is supported beneath the mounting block 2211. The shaft 2163 has a bevel gear 222 fixed thereon beneath the gear 216G, and this bevel gear is meshed with a bevel gear 223 that is rotatably supported on a bearing sleeve 224 and a stub shaft 225 disposed on a rearwardly projecting horizontal axis in the mounting block 188. The bevel gear 223 has a drive sprocket 226 Xed thereon, as shown in Fig. 7, so that the rear edge jogger unit 2111 may be driven in timed relation to the other elements in the machine, as will hereinafter be described.

The jogger arm 211 is mounted on the two chains 215 and 216 as best shown in Figs. and 6 so that the jogger arm is actuated through the desired cycle of movement as hereinabove described. For this purpose, the jogger arrn 211 has an elongated slot 211S formed longitudinally thereof, and this slot is arranged to slidably embrace an upwardly extending mounting bolt or stud 2313 that is afforded as an extension of one of the connecting pins of the chain 215. Above the arm 211, a washer 231 is positioned about the stud 230, and a nut 232 holds the washer 231 against undesired upward displacement. The arm 211 also extends in a rearward direction to a point over the chain 216, and a similar stud and washer arrangement 234 is afforded as an extension of one of the pivot pins of the chain 216, this stud and washer arrangement 234 also being arranged in a similar manner in respect to the slot 211S. An anchoring pin 235 extends upwardly from the arm 211 adjacent to its rear end, and a tension spring 236 extends between this stud 235 and an upward extension 237 of the stud 230. Thus, the spring 236 normally acts to yieldingly urge the arm 211 in a forward direction until the left-hand end of the slot 2118 engages the stud 234, and this yielding force, applied to the arm 211, functions in causing the arm 211 to have a vibrating motion, as will be hereinafter described. In this respect, it may be pointed out that at its right-hand or forward end, the arm 211 has a relatively narrow 211T projecting longitudinally adapted to engage a saw tooth rack 241) that extends longitudinally along the forward side of the feed conveyor. This rack.24tl is carried in a mounting bar or housing 241 that is adjustably supported by screw and nut devices 242 and brackets 243 so that the housing 241 may be adjusted from front to rear with respect to the feed conveyor. The rack 241) is arranged so that it is urged yieldingly in a forward direction to an extent that is limited by a pair overhanging shoulders 2418 disposed adjacent to the ends of the housing 241. The forward yielding force is afforded by a leaf-type spring 244 that is disposed within the housing 241 so as to urge the rack 240 in a rearward or left-hand direction, as viewed in Fig. 6. With the rack 240 thus positioned, the tooth 211T is arranged to ride along and across the several teeth of 10 the rack as the arm 211 moves in an advancing direction along the feed conveyor, and this causes the arm 211 of the b ook that is at this location on the conveyor.

In` Flg. 6 of the drawings, the path of movement of as it starts its entering movement. This position has been indicated by the numeral 1, and successive positions have been indicated by the numerals "2 to "7, inclusive. A comparison of these successive positions shows that as the arm 211 enters in a transverse direction over the conveyor, it also moves in an advancing direction. and just after it reaches the position indicated by the numeral 7, it will engage the book B, and will shortly thereafter become engaged with the rack 240 so as to have jogging or vibrating movements applied thereto. The timing and arrangement of the parts is such that the jogging arm 211, in its advancing movement, actually advances the book B slightly with respect to the lug that is disposed rearwardly of the book, and hence the jogging action of the arm 211 is rendered effective to the maximum degree. When the jogging action has been applied for a considerable length of travel along the feed conveyor, the arm 211 starts upon its withdrawing cycle of movement. Several successive positions through which the jogging arm 211 moves in this cycle have been indicated by numbered lines from "7 to 14, and 1t will be noted in respect to this withdrawing cycle of movement that the arm 211 first is withdrawn in a retracting direction, or in other words, in a direction opposite to the aforesaid advancing direction, and thereafter it assumes an angular position as it is withdrawn in a rearward direction to the relationship shown by numbered line 14. The withdrawing movement, of course, proceeds beyond that indicated by the numbered lme 14 and the arm 211 is subsequently returned through the position indicated by the numbered line 1 so that 1t may proceed with the next entering and Jogging operation, which will be the same as that above descrlbed.

As the book is further advanced after the aforesaid rear edge jogging by the unit 210, it is moved into the bight of the clamping conveyors so as to be clamped therebetween for further advancing movement, and as will be evident in Fig. 20 of the drawings, the clamped relationship of the books B between the clamping conveyors is such that the lower edges of the book, which are to be glued, are disposed somewhat below the lower edges of the belts 52F and 52K of the clamping conveyors. After a book B has been clamped between the clamping conveyors, the lug 195 is caused to be retracted gradually downwardly and out of contact with the book B, as shown in Fig. 13, this being accomplished by a gradual downward taper on the upper surfaces of the rails 145, which in the area opposite the clamping conveyors, have smooth upper surfaces.

Somewhat beyond the right-hand end of the feed conveyor 136, as viewed in Fig. 12, and after the books have been firmly clamped between the clamping conveyors, the books are moved across the glue applying and brushing unit 38, which is shown in detail in Figs. 12, 13 and 20 of the drawings. This gluing and brushing unit embodies a liquid-jacketed glue pot 250 that opens upwardly and is provided with a liquid chamber 250C, which surrounds the side walls and extends beneath the bottom of the glue receiving internal chamber 252, it being noted that this internal chamber is provided with a bottom drain opening 253 that extends downwardly through the liquid chamber 250C and is closed by a removable plug 254. The glue pot 250 is provided with a plurality of relatively large tubular type electric heaters 255 that extend into the forward and rear sides of the glue pot so as to be disposed within the chamber 250C, thereby to be effective to heat the liquid that is provided within this chamber. The glue lll pot 251). is. supported, asY will hereinafter. be described in some. detail', so that av gluev applying wheel 26SY that is mounted therein. on a` horizontal axis may engage at its upper edge with. the lower edges of the books B- as they are movedover the; glue pot.- byfthe clamping conveyors. The glue applyingwheellZ'is mounted on a horizontal shafti 26d thatextends through a bearing 262 formed in therear side wall` of theglueipot, and on. the extending 264 is atforded for imrear end@ of. this shaft; a drivel gear partingrotation tothegluewheellZil, as will-hereinafter beA described.

The: glue wheelA 260 is rotatedl in. a clockwise direction as indicated. by the arrow-in Figi 20, and the amount of gluethat.- is applied to= the-books-is governed by a scraper blade 265 thatiispivoted. on ahorizontal shaft 266 adjacentthe left-hand end-r edgelof. the glue pot as viewed in Fig. 20. rFhis scraperl 265: has its` right-hand. end positioned over the glue wheel 2601 just to, the left of the highest.- point of the glue wheel, as` viewed in Fig. 2i), and by its spacinglfrorn-A thel gluewheel 260, governs the amount of glue-that is to be applied to the books-B. This spacing of the scraper may be readily adjusted, and this is attainedby means of a positioning arm 2,68 that is fixedonvthe shaft 266and extends downwardly along the, for-ward. edge ofthe glue pot. At its lower end, this-l arm` 268l has a stationary bolt 2751 extendedtherethrough, and a springv 2.71 surrounding the bolt between the arm-26S- andthefheate-:l right-hand end of theboltg27l`- serves to-urge the arm 268 in a clockwise direction, such movement along the bolt2f7@ being limited by anadjustable stop nut 272; The bolt 27@ is supported by thread-ing thefsamethrough a. stationary lug 273 that is afforded on the forward face of the glue pot and a loclt'nuty 274 is providedon the left-hand end of the bolt 279 toreadily securethesame in position. lt will be noted, of course, that the desired'adjustment of the locationlof thescraper 265-maybe attained either by adjust ment or the stop-.nut 2725 or. byadjustment ofV the longitud-inal positionofthe bolt/Till,` and in the latter case it would be necessary tofrelease and-.then tighten the lock nut-2f74.

In order to assure continuedproper operation of the scraper-265,V this scraperI is maintained in a heated condition atv alltirnes, and-.this is accomplished by means of an electrioheater-275lA thatA is-supported in a mounting block 276 carried onl the scraper 26S adjacent to the right-handor-etfectiveend thereof'.

it willbe obseryed that the glue wheel 2e@ is located relatively close tottheleft-hand end portion of thc glue pot-250,. 'andafter theglue-has been applied to the lower edges ofA the;bool s B, it is desirabletobrush this glue so as-to produce uniformity of application andzprevent the use of-'jan excessive amount off glue. This isattained throughthe usesrof'a brush 259 which is of the wirebristled, metal'backedtype. The brush 2% isi` :.novably mounted in atholder 2st, and this holder is pivoted on a horizontalshaft 282-that is disposed on the right-hand end wallofthe glue `pot 259,1as will be evident in Fig. 20 of the draw-ings.` The brushtZSil-has a metal back thereof so formed-aste receive a transversely extending electrical heating element-233zvvhereby the brush 2Stl1is maintained atsuch-a temperature that-glue-will not harden thereon. The-brushl 28) normally-tendsl by gravity to move to a downward or.retracted.position,y as shown in Fig. 2O of the drawings, andtafter the forward edge of a book has been moved into position over the brush, thisbrush is caused to move upwardly. intoan engaged or brushing relationship with respectto vthe lower edges of the books. The requiredilifting. force is in the present instance applied through a solenoid 285 that is operativelyassociated with the shaft 232through an arm V286 that is fixed on the rear end of the shaft 28.2; asshown irl-Fig, l2 of the drawings.,

Thepropertiming ofjthekraisinggand lowering movements of the brush 289A isattained by sensing the individual books B ,as they move into; position overthe'brush 280,. Thus,as showninrigs.v l2,A i3 and 2i), a switch 28S; ismounted'on thev rear frameAR, and thisV switch has a sensingarrn 29,0;associatedtherewith so that a sensing, roller` 290K carriedronq the end, of l the arm 2% projectsyinto the path fof the booksB just above tne belt 52K. The locationof th e. r0ller-s2 9ll issoxrelatedto the brushh2tlthat lthe switchjti; is closedonly. after the leading edge-.of the book; B; has beenmoved into position over at least a portion of the-bristles ofthe brush 23%3.

this scraper `pivoted on a horizontal axis E2 This insures that the brush- 2801 will not contact the forward edge portions of the book and the undcsired deposit of glue on these forward edges is thereby avoided. When the switch 28S is thus closed, the solenoid` 235 is energized to attain the desired brush liftingfaction, and the arrangement is such that the roller 290K runs olf of the rear edge of the book so asV to thereby open the switch 238 and drop the brush 230 at almost the exact time that the rear edge of the book B passes beyond the most righthand bristles of the brush 280. This action is attained by locating the roller 290K directly over the most righthand bristles of the brush 234i.

The glue pot 25@ under the present invention is so mounted and supported as to facilitate the lling and cleaning operations that must be performed, and also to facilitate the adjustment of the vertical location of the glue wheel 26th ln aording such a mounting, a stationary mounting bed 29S is provided, as shown in Fig. 13 of the drawings, this bed 235 being extended to the right from the upright support 44 and being supported at its right-hand end by a relatively low supporting member 296. On the bed 295, a pair. of stationary mounting rails 297 are fixed at spaced points so as to extend transversely across the bed 295V and so as to extend a substantial distance forwardly beyond the bed 295, as shown in Fig. l2 of the drawings. These extending mounting rails 297 are utilized to afford a movable support for the glue pot 250 so that the glue pot may be moved forwardly from its operating position and into a partially projecting forward position in which it may be readily adjusted, illed or cleaned. rhe glue pot 25@ is mounted on the rails 297 through the use of acarriage formed by an intermediate ilat base plate 3th) which has downwardly projecting mounting block elements 391 along its opposite end edges. On these mounting block members, a plurality of rollers 3tl3 are provided, and these rollers are argranged to engageV guide surfaces of the supporting rails 2 7.

Thus, each rail 297 comprises bottom and top plates 297A and 297B andan intermediate plate 297C that are fixed together to afford laterally opening channels in which the rollers 393 are arranged to ride between the top and bottom plates. Stop pins 2978 are mounted in the lower plates 297A adjacent the front and rear'ends of the rails to limit the maximum movements of the glue pot along the rails. ln addition7 a retractable locking device 305 is alforded on one of the rails for locking the glue pot in its inner or rear position. The glue pot is, of course, supported on the base plate 301.in a manner to be presently described, and by rolling the base plate 361i in a front t0 rear direction,rthe'desired movements of the glue pot 25) may be attained. This is accomplished in the present instance by alfording a downwardly facing rack 319 on the base plate 303i, which engages a pinion 3M, this pinion being carried on a horizontal shaft 312 mounted in the bed 295. The shaft 312 extends to the right as shown in Figs. i3 and 20, and has an operatingvcrank 313 fixed on its right-hand end just beyond the edge of the bed 295. By operation of the crank 313, the desired shifting movements may be applied to the glue pot in a front to rear direction.

The glue pot is` supported on the base plate Zilli by means of horizontal hinge means 31S that are disposed along the right-hand end edge of the structure, the two elements of the hingebeing connected respectively to the glue pot 25d and the mounting lugs 301-of the base plate. Adjacent to the other or left-hand end of the glue pot, means are afforded for gradually raising and lowering such left-hand end of the glue pot to effectually raise and lower the glue applying wheel 266. In the present instance this is accomplished by a cam plate 320 that is 321 afforded on and below the base plate 300. The cam plate 320 has a cani slot 322 formed therein that is of arcuate form and located so as to be slightly eccentric with respect to the axis of the shaft 32d. The cam slot 322 has a stud 323 extended therethrough, this stud 323 being xed to or integral with the side wall of the glue pot 250. On the projecting threaded end of the stud 323, a wing nut 324 is provided so that by tightening the wing nut 324 the angular location of the camplate 320 may be fixed. When it is desired to adjust the vertical location of the glue wheel 260, the wingnut324 is loosened and the cam plate 320 is moved angularly through the use of a relatively long ,projecting handle 32S.that is fixed to the 13 cam plate. The degree of eccentricity of the cam slot 322 is relatively slight so that the desired adjustment of the vertical position of thc glue wheel 260 may be adjusted with extreme accuracy.

After the lower edges of the books B have been glued and brushed as hereinabove described, the further advancing movement thereof by the clamping conveyors moves the books into ing belt 330, Figs. 18 and 19, which constitutes a portion of the unit 40 of the machine. In affording the unit 40 of the machine, a pair of longitudinal supporting beams 331 are supported at substantially the level of the shaft 85 and so as to project to the right for a substantial distance therefrom. This mounting and location of the beams 331 is afforded by a vertical standard 332 that is extended upwardly from the base 80 directly beneath the shaft 85, and by a pair of upwardly extending angularly disposed supports 333 that extend upwardly from the base 8@ and are connected to the respective beams 331 a substantial distance to the right of the standards 332, as shown in Fig. 19. Adjacent to their right-hand ends, the two beams 331 are connected by a cross-plate 334. On each of the beams 331, a pair of mounting platforms are supported, such mounting platforms being identified as platforms 335F and 335K, and these platforms being extended slightly under the opposite edges of the upper run of the belt 330, which is supported in a manner that will be described presently. On the rear platform 335R, an upstanding guide rail 337R is adjustably supported by means including a pair of brackets 338K so that this bracket will serve as a lateral support for books that are moved to the right, Fig. 18, on the belt 330. A similar front guide rail 337F is similarly positioned, but with respect to the front guide rail 337F, a different mounting is aiforded so as to facilitate adjustment of the space between the two guide rails to accommodate dilerent thicknesses or books. Thus, a pair of spaced vertical shafts 339 are supported in bearing brackets 340 carried on the upper surface of the platform 335F. Each shaft 339 has an arm 340 fixed thereon which at its end is pivotally connected to a corresponding forwardly projecting bracket 341. The arms 340 are similarly positioned so that by equal rotative movements of the shafts 339, the side rail 337F may be adjusted with a parallel motion. This equal adjusting or rotating movement is applied to the shafts 339 by a link 343 that is connected 'between a pair of similar arms 344 xed on the respective shafts 339 beneath the platform 335F. The adjustment that is attained by actuation of the link 343 may be preserved by any sort of lock-nut mechanism, but in the present instance, this lock-nut mechanism is in the form of a locknut 345 threaded on the right-hand shaft 339 and adapted to be locked against the related bracket 340.

The upper or conveying run of the endless belt 330 is supported at opposite ends by pulleys 350 and 351, the pulley 350 being mounted in a bracket 352, that is carried on the frame member 46. The other pulley 351 is carried in a pair of brackets 354, that are mounted on the respective beams 331 just to the right of the righthand edge of the plates 335F and 335R. The belt is extended downwardly from the pulley 350 and beneath a guide pulley 356 that is supported in the bracket 352. From the pulley 356 the belt is extended to the right and beneath a relatively large pulley 357 that is supported in the brackets 358 extended downwardly from the respective beams 331. The belt is then extended upwardly about a pulley 359 which serves as an idler pulley, as will hereinafter be described, and from this pulley 359 the belt is extended to the left beneath and then around a drive pulley 360 which is mounted on a drive shaft 361 in brackets 362 carried on the upper face of the two beams 331. The belt 330 is then extended from the upper edge of the pulley 360 and along the lower edge of the pulley 351, thereby belt. The pulley 359 is mounted on one end of a bell crank 364 that is centrally pivoted on the frame members 333, and a weight 365 is suspended from the other arm of the bell crank 364, thereby to apply a take-up force to the pulley 359 to keep the belt 330 in the properly tensioned relationship.

The pulley 357 is so supported that the lower edge thereof extends downwardly into a removable mounted and hence, in

the rotating movement of the pulley 357, the belt 330 is to complete the path of the passed the water contained in the pan 366. The belt 330 is preferably made from a fabric material such as canvas and serves to carry an appreciable amount of water as it moves out of the pan. The amount of water carried upwardly onto the upper run of the belt is governed and controlled by what amounts to a pressure roller 368 that is mounted in opposed relation to the pulley 356, it being noted that both of these pulleys are disposed over the left-hand end of the pan 366 so that any wringing action will cause the Water to drop back into the pan 366. The belt 330 is thus maintained in a wet condition at all times, and by passing the same through the water in the pan 366, the belt is maintained relatively cool. Hence, when a book that has been glued with a hot melt adhesive is passed into position on the belt 330, the water on the belt serves as a cooling medium so that by the time the book has been moved to the right-hand end of the belt 330, and is ready for discharge onto the collecting platform 41, the adhesive will have been cooled and set to a sutiicient extent to prevent undesired adhesion to other books or objects. ln the event that the books are being glued with animal glue, the wet condition of the belt 330 prevents adherence of such animal glue to the belt, and hence the books may be readily and easily removed from the belt 330 at the right-hand end thereof so that they may be stagger-piled in the usual manner for drying, as indicated in Fig. 23 of the drawings.

The driving forces are applied to the drive pulley 360, by connecting the shaft 361 to the driven shaft of the machine, and this is accomplished by fixing sprockets 375 and 371i on the respective shafts 35 and 361, and connecting these sprockets by an endless drive chain 377.

As hereinbefore pointed out, the glue wheel 260 is constantly operated and the drive therefor is derived from the gear 138, as shown in Figs. 12 and 13. Thus, an intermediate gear 333 meshes with the gear 13), and a smaller transmitting gear 331 is meshed with the gear 3311 as well as with the gear 264 which, it will be recalled, is fixed on the mounting shaft of the glue wheel 260.

The drive for the cam and for the rear edge jogger unit 21@ is derived through a common chain drive from the shaft 133 which, of course, is constantly driven from the gear 136, as hereinabove described. Thus, as shown in Fig. 5 of the drawings, the shaft 133 has a sprocket 335 hxed thereon and an endless chain 386 is extended, as will hereinafter be described, so as to drivingly connect this sprocket 335 with the sprocket that is associated with the cani 135, and the sprocket 226 that is mounted on the axis of the shaft 225 and which serves as the driving source for the rear edge jogger unit 210. The chain 356 is extended from the upper edge of the sprocket 33S in a right-hand direction and somewhat downwardly, as viewed in Fig. 5, and is extended beneath and about a guide sprocket 387 and is then reversely extended to the left beneath the sprocket 225 and then upwardly about the left-hand side of such sprocket and then to the right from the top of this sprocket, as shown in Fig. 5. The chain is then extended across the top of the sprocket 19@ and around the right-hand edge thereof, and it is then extended downwardly and to the right about a stationary guide sprocket 388, from which sprocket the chain extends further to the left and in an upward direction past a take-up sprocket 389 and to the lower edge of the sprocket 385. This serves to drive the rear edge jogger unit 219 and the feed cam 185 in timed relation to the other elements in the machine.

The feed belts 155B of the magazine M are also driven in timed relation to the operation of the machine, but

such belts 155B are intermittently driven and are actuated in each cycle in an amount that may be adjusted in accordance with the thickness of the books that are being glued. Thus, as shown in Figs. 2, 4 and 4A, the shaft 16d, upon which the belt-actuating pulleys 166 are mounted, is connected by a universal joint 390 to one end of a transmitting shaft 391, the other end of which is connected by a universal joint 392 to a horizontal shaft 393. This shaft 393 is disposed in an aligned relationship with respect to a drive shaft 394, and is adapted to be connected to the shaft 394 by means of a ratchet type clutch 395' that will be described in detail hereinafter. The shaft 394 is connected by bevel gears 395 to the cross-shaft 133 which drives the feed conveyor 136, and the drive shaft 394 is, tl erefore, constantly rotated during operation of the machine. The ratchet type clutch 395 is effective to operatively connect the shaft 394 to the? shaft 393 throughout a Vpredetermined and.4 adjustable angular portion of'l the rotative travel of the shaft. Eig-W thereby to cause: an adjustable advancing movement: of the: belts SSB in each cyclefof'machine operation. This isaccomplished by affording a ratchet wheelv 466 that is fixed on. the shaft 393- adjacent to its right-hand end as viewed in Fig. 4, and on the shaft 394- adjacent to the ratchet wheel 400, a transversely extending. carrier. arm 40d` is. fixed: so that it is constantly-rotated with the-shaft 3.9.4 in. a plane adjacent to the ratchet wheelg 4%. The carrier armv 491- has a transverse rock shaft4t3 mounted onionefendthereof and parallel; tothenaxis of the shaft 394. On4 one end` of: thisshaft 403, a drive` trawl-464: is fixed. so` that by rocking.l movementv of the shaft lid, the pawldddmay be moved intoor out of engagement respect tothe ratchetI wheel 40o; An arm 405 on the shaftV 403 has a` spring: 406 acting.. thereon between the other` endof the carrier ar-m Libi and the arr-,i .435 to tend to.` rotate the shaft: 46:3 tofengage the drive pawl dihivwith the: ratchet .vheel` 490. Such engagement is. controlled.: by a pairfofl adjustable, stationair# mounted cams4=1tlA and 4dB,-eachf ofy which has a lobe L that extends through substantially' 180 of the periphery of the The cams HOA and filth? have arcuateslots formed therein throughout? substantially 90 so that a locking boltA il mayf extend therethrough whiie at the same time permitting the desired angolari adjustment of these cams, as will hereinafter be described. The two cams 410 are disposed against the left-hand face of a mounting bracket i12 that machine in such a position that the shaft 3911.- passes through such bracket. The location of the cams 41d is such that these cams are relatively ciose to the carrier arm A91, and the arm 465 of the rock shaft #if-3 has a relatively long cam roiier 415 mounted on the end thereof so that the spring. 4856' normally tends to maintain the roller- 415 in engagement with4 the edgeV surfaces of the two cams 416. The cams 'lllt). are so adjusted that the desired angular engagement of the pawl etiliwith the ratchet wheel itl-d is attained in each cycle ofeperation of the. machine, and it might be pointed out in this respect that-so long as the roller 415 is in engagement with either of the lobes L of these cams, the pawl 494 is disengaged, but during the balance of the rotative movement of the shaft 394, Vor, in other words, when the roller i5 is opposite the low portions of the cams, the pawlv 404' is engaged with the ratchet wheel 40d and serves to drive the belts 155B. it mightbe pointed out that the extent of movement of the belts 155B is, in most instances, arangedvto be somewhat greater than the thickness of the books that are being fed, this expedient serving to insure completion of the feedingmovement despite the fact that theI books are fed merely by friction of thebeits against the lower edges of the books.

inthe gluing of books, it has been found that' in some 'f instances the assembly of the books has been carelessly done, and in such an instance a book that has been sewn together may include one or more extra signatures S so as to be of an unduly great thickness. When such an oversize book is fed into the machine, it will be evident that the clamping action between the two clamping conveyors will be disturbed, and while this situation does not arise very frequently, it may be considered desirable to avoid the adverse effects that follow in mani]l instances. Thus, it wiil be clear that when an oversize book is en countered, it will necessarily tend to separate or spread the clamping conveyors, thereby tending to release the clamping action on the adjacent books that may be betweenkthe clamping conveyors, and this may result in spoiling one or more books. In order that this may be avoided in those instances where the vcost is considered objectionable, one of the back-up structures associated with the clamping conveyors may take the form illustrated in Figs. l3-A and lS-B of the drawings. 'in accomplishing this, the rear rail (idR is shown in Fig. 13 as being. of a somewhat greater thickness than in Fig. i6, andL thebearing strip @ik is illustrated as being mounted on the rail 66K byY means of springs 420 that are seated at their opposite ends in mounting recesses 523i and 42?; formed, respectively, in the members eilt and edil. These springs are arranged at relatively close intervals, and a row of springs is disposed adjacent the upper edge as wellas thelower edge ofthe bearing strip oitRj. Wit

this.-arrangement,A the belt. 52K may conform with-.the

with

however,

is secured to the frame of the thickness of. the books, that are encountered, and in the event thatan oversize bookpasses into theclam'p'ing conveyor. mechanism, itwill cause the belt SZR to be moved rearwardly only in that area that is opposite or immediately adjacent to such book, the other portions of the belt remaining in their. normall plane so as to maintain the desired clamping action on the adjacent books that are of the proper size. This avoids unclamping of the adjacentl books by an oversize book and insures that there will b e no spoilage of books that are otherwise satisfactory.

From the foregoing description it will be apparent that the present invention materially simplifies the gluing of book backs, andA ena lesvsuch gluing to be performed at a' relatively high rate of speed while at the same time insuring uniformity and accuracy in the finished product.

It will also be evident that the present invention enables such gluing operations' to be performed with either hot melt adhesivesvor animal glues, and enables this to be accomplished in a single machine without any material alterations in the machine. Furthermore, the present invention affordsvmeans in-such abook back gluing machine which iseffective wherehot melt adhesives are used to quickly set" such adhesive and dissipate the heat so that the book back gluing operationl may be performed at a relatively high speed, and-this means is afforded in a form such that undesired adhesion is avoided where the relatively slow setting animal glues are employed.

ltwill also beapparent'from the foregoing description that the present inventionenables the signatures to be fed automatically, into the gluing machine in groups, and enables the signatures included in each such group to be readily shifted and positioned one with respect to the other so as` to insure accuracy and uniformity in the finished product.A Moreover, the present invention enables such automatic feeding of the groups of signatures and such positioning or aligning ofl the signatures of such group with respect to each other to be readily and easily attained, and enables-this to be accomplished at a relatively high rate of` speed in-such away that the operations may be performed by mechanism of a character that may be simply and easily maintained.

It willalso be clear that thel present invention affords a book back' gluingmachine that is capable of handling books of different thicknesses, and that the machine is so arranged-toenable the machine to be set quickly and easily for any differentrthickness of book.

Itwill also be evident that under the present invention the brushing'operation which removes the excess glue is performed accurately and without transferring glue to the end edges of the books. Moreover, under the present invention, the brushingoperation of the aforesaid character is performed on thefbooks that are moving rapidly through a machine, and this brushing operation is performed and controlled'fin such away that proper operation of the machine onl books ofdifferent sizes is assured.

We claim:

1. In a machine for: gluing book backs, a horizontally disposed glue applying means, a glue-brushing means disposed adjacent to said glue applying means and mounted for vertical shifting movement between a lower ineffective position and an upper effective position, a clamping conveyor comprising a pain of endless belts, guiding and driving pulleys for the respectivebelts mounted on vertical axes and operable te dispose said belts with a first run of one belt disposed in opposed andadjacent relation to a first run of the other belt so'that said first runs of the two belts constitute clamping runs between which a group of signatures that are to constitute a book may be clamped with the folded edges of theV signatures exposed in a horizontal 'plane beneath said clamping runs of sai belts, said clampingruns. extendingv over said glue applying means and said glue-brushing. means, synchronized means driving one pulley associated with each belt to drive said clampingruns of said belts in a direction such that agroup, ofsignatures is moved first over said glueapplying means and thenover said glue-brushing means, back-up means for the clamping runs of said belts to assure uniformity ofy clamping of suchV a group of signatures-during advancingV movement by said belts, sensing means adapted to be engaged by each such group after application of glue thereto and when the leading edge of such group is disposed over said glue-brushing means, actuating meansfoperablefundercontrol of said sensing meansfto. raise-saidlglue-brushing means to its effective position, a fabric discharge conveyor belt onto which the glued books are discharged by said clamping belts, and means for maintaining said fabric discharge belt in a wet condition.

2. In a machine for gluing book backs, a horizontally disposed glue applying means, a glue-brushing means disposed adjacent to said glue applying means and mounted for vertical shifting movement between a lower ineffective position and an upper effective position, a clamping conveyor comprising a pair of endless belts, guiding and driving pulleys for the respective belts mounted on vertical axes and operable to dispose said belts with a first run of one belt disposed in opposed and adjacent relation to a first run of the other belt so that said first runs of the two belts constitute clamping runs between which a group of signatures that are to constitute a book may be clamped with the folded edges of the signatures exposed in a horizontal plane beneath said clamping runs of said belts, said clamping runs extending over said glue-applying means and said glue-brushing means, synchronized means driving one pulley associated with each belt to drive said clamping runs of said belts 1n a direction such that a group of signatures is moved first over said glueapplying means and then over said glue-brushing means, back-up means for the clamping runs of said belts to assure uniformity of clamping of such a group of signatures during advancing movement by said belts, sensing means adapted to be engaged by each such group after application of glue thereto and when the leading edge of such group is disposed over said glue-brushing means, and actuating means operable under control of said sensing means to raise said glue-brushing means to its effective position` 3. In a machine for gluing book backs, glue-applying means, a glue-brushing means disposed adjacent to said glue-applying means and mounted for shifting movement between an ineffective position and an effective position,

ever a-book 1s disposed opposite said brushing means, said trol of the sensing element to shift the glue-brushing means to effective position after the leading edge of a signature has engaged the sensing element.

4. In a machine for gluing book backs, a horizontally disposed glue-applying means, a glue-brushing means, a clamping conveyor means operable to clamp a group of signatures that are to constitute a book with the folded edges of the signatures exposed, said conveyor being movable past sa1d glue-applying means and said glue-brushing means in succession, and means operable while each such book is moving past said brushing means to shift said brushing means into engagement with the folded edges of the signatures, said last-named means being under control to thereby effect shifting of the glue-brushing means into said engagement and to effect lowering of the glue-brushing means out of said engagement as the trailing end of such book passes the sensing element.

5. In a machine for gluing book backs, a glue-applying means, a glue-brushing means disposed adjacent to means adapted to be engaged by each such group after application of glue thereto and when the leading edge of such group is disposed opposite said glue-brushing means, and actuating means operable under control of said sensing means to shift said glue-brushing means to its effective position.

6. In a machine for gluing book backs, a glue-applying means, a glue-brushing means disposed adjacent to said glue-applying means and mounted for vertical shifting movement .between a lower ineffective position and are respectively intended to constitute books with the folded edges of the signatures of the several groups exposed in a common plane parallel to said path, said path extending past said glue-applying means and said gluerection such that each such group of signatures is moved first past said glue-applying means and then past said glue-brushing means, and actuating means effective whenever a book is disposed opposite said brushing means to shift said glue-brushing means to its effective position, said actuating means including a sensing element adapted to be engaged by the leading end of a book passing therebeneath and adapted to be released by the trailing end of a book passing therebeneath whereby the brushing means are respectively shifted into effective position and lowered into an ineffective position.

7. In a machine for gluing book backs, a horizontally disposed glue applying means, a clamping conveyor comprising a pair of endless sheet metal belts, guiding and driving pulleys for the respective belts mounted on vertical axes and operable to dispose said belts with a first run of one belt disposed in opposed and adjacent rela` tion to a first run of the other belt so that said first runs said belts in a direction such that a group of signatures is moved over said glue-applying means, back-up means for the clamping runs of said belts to assure uniformity of clamping of such a group of signatures during advancing movement by said belts, each of said back-up means including an elongated and self-adjusting bearing strip against which the related belt runs thereby to accommodate signatures of varying thickness, a fabric discharge conveyor belt onto which the glued books are discharged by said clamping belts, and means for maintaining said fabric discharge belt in a wet condition.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 845,369 Murray Feb. 26, 1907 1,023,569 .luengst Apr. 16, 1912 1,168,467 Bell Ian. 18, 1916 1,534,701 Gray Apr. 21, 1925 1,811,201 Kleineberg June 23, 1931 2,163,812 Schramm June 27, 1939 2,190,970 Ashlock Feb. 20, 1940 

